I too use 20# on my spinning reels. Just the pound test I'm most comfortable with. I have a friend who uses 15# S8S on his reel and I've never had a problem casting the same distance as him using 20#. At present I have regular PP (green) on one reel, 20# 832 Ghost on one (a nice line but I prefer PP), and 20# P-Line Spectrex on another. The P-Line is the nicest handling longest casting line of the three but I can't get it locally so I rarely have it. Also a few months back I picked up a 300 yard spool of PP white in 20# that should last me a good long while.  

 

I've been fishing white PP Micro Line 4# on my ultra light and loved it so I thought I'd give the white a try in the higher pound test.

Interesting to see that in spite of the newer 8 strand braids - many still like traditional PP Spectra in the <20lb. line weights .

Ive used all five extensively and highly recommend the sufix performance and regular power pro. 

Good old plain Power Pro works for me.

Ive used all five extensively and highly recommend the sufix performance and regular power pro. 

All said and done , I'm willing to try the regular PP and Sufix Performance first before moving up to a higher priced braid - I may not even need .

I use 10# PP Slick.  Been using it for 3 seasons now without any issues.  I think the coating is perfect, especially for removing to tie strong leader knots.